Wrench.



M. E. GRANDALL.

WRENCH.

APPLICATION FILED JUNE10,1913.

1,1 18,532. Patented Nov. 24, 1914.

wue/wto'u Miflran in. 22

. ing faces of the xed and movable jaws will UNITED STATES ra rnnr OFFKGE.

MAX E, omivnannornmerrsnnn, OKLAHOMA, .AssIeNqa or ONEj- I-IALF T0 L.

common mnerisnnn, cannons... l

WRENCH. l

Specification of Letters Patent.

P tented not. 24., 1 914.

Application filaiuaeio, 191a se arrnb. 772,663.

, erably formed from a blank of heavy sheet nietal and includes spaced cheek platesqlh.

pipe to be turned and L which will firmly grip the nut or pipe as pressure is exerted against the handle.

It is another aimof the inventionto so construct the .wrenchthat the movable jaw thereof may be readily adjusted along the V fixed jaw and its shankby. the thinnb of the hand grasping the wrench handle.

The invention also aims to provide a sup port. for the movable jaw which, while it.

willbe firmly and securely held in adjusted position, may be. readily adjusted by the thumb as above stated.

Another feature of the invention resides in so constructln the wrench that the workbe at all times parallel regardless ofthe size or diameter of the pipe or nut gripped be tween them. 1

In the accompanying drawings: Figure l is a perspective view of the wrench embody- .ing the present invention; Fig. 2 is a view wpartly in side elevation and partly in section illustrating the wrench applied to a pipe to be turned; Fig.3 is a. group perspective= view illustrating the support or mount for the movable j aw of the wrench.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accoinpanying drawings by the same reference characters.

In the drawings, the handle of the wrench.

is indicated by the numeral 1 and beyond its grip portion it isformed into a shank 2 and fixed jaw 3. It is preferable that the and it will be observedthat the teeth of this face extend transversely thereof and are inj clined at an angle from the plane. of the shank and jaw be of substantially the same face in the dircction of the extremity of the aw. For a purpose which wlll be presently explained, the rear face of the jaw 3 and shank 2 is formed with a number of transversely extending grooves .oiuseats 5 substantiallysemi-circular in contour.

The support for the movable aw is prefagainst the sides of the shank 2 and jaw 3, 1t belng observed that the plates he upon opposite sides of said jaw and its shank. The offset portions 8 of the cheek plates are provided upon their forward edges with inwardly pro ecting fingers 9, the ends of.

which registeras shown in' Fig. 3. In addition to the connecting portion 7 a the cheek plates are connected by transversely extending pins 10 of which there aretwo, .these pins being so spaced that they willljengage in spaced ones of the seats 5. inthe manner shown in Figs. 1. and 2. In. order to hold the support in position with thepinsengaging in the seats, as stated, there isprovided a leaf-springll which hasone end bent substantiallv at right angles as at 12 and its intermediate portion bowed, asf at 13, the other. end of the springbeing acutely bent, as at 14, so as teeth 4: of the fixed jaw.

to cooperate withithe.

In; assembling the spring of the support,

it is inserted beneath the fingers 9 and its end 12 1S engaged belund the connecting portion 7 it being observed that the ad acent end ofthe bowedportion 13 forms a,

shoulder 15 whichalnlts againstthe edges of the fingers 9 and serves to prevent ,CllS- placement of the spring and disengagement of itsend 12 from the connecting portion 7.

By referring to Fig. .3 of the drawings, it will be seen that wh1le the spring normally holds both of; the pins 10 engaged in the seats 5 andholds the connecting portion 7 spaced from the forward face. of the shank 2 and jaw; 3, pressure may be exerted against y 1 the spring and against the connecting portion 7 1n the direction of the shankfl so, as to disengage the pins fromthe seats, wherebyto permit of. theslidingof the support along the shank and jaw.

of the pinslO. The outer orforward ends of the links are pivoted to the ends of .pins

19 which are fitted throu h the movable aw 15. As stated above the links are parallel "and as a consequence when they are swung so as to more the aw 16 toward and away from the jaw 3, the jaws will be maintained in pa allel relation. It will be apparent that f t'he support for the movable may be adjusted along the shank and fixed jaw 3 so as to adapt the jaws to grip nuts and pipes of various diameters. For if the lower one of the pins 10 in Fig. of the drawings, is engaged in the lower one of the seats 5 in saidiigure, and the movable jaw is moved into engagement against the face of the fixed aw 3, the extremities of the aws will register and consequently the maximum bearing surface is provided and the wrench is adapt ed for use in gripping nuts and pipes of small diameter. lVhen the wrench is to be employed in gripping nuts and pipes of large diameter, however, the support is slid upon the shank 22 until the pins 10 engage in. the upper ones of the seats 6. It will, of course, 3e understood that when the wrench held approximately horizontal with the movable jaw uppermost and the fixed jaw 3 is disposed against the under side of a pipe to be turned, the movable jaw will drop into engagement with the upper side of the pipe and due to the angular relation of the teeth 4: and 17, the pipe will be firmly gripped when the downward pressure is exerted against the handle 1. It will further be seen that as the teeth 17 bite into the pipe to be turned, there is a tendency for the movable jaw 16 to be drawn forwardly, in

the event of which it must approach the jaw 3 so that the pipe is firmly gripped. I

'In order that the thin pipes to which the wrench is applied may not be crushed when gripped by the aws, means is provided for limiting the movement of the jaw 16 toward the jaw 3, and this means consists of a relatively long threaded stem 20 which is threaded through the movable jaw 16 and is adapted to bear at one end against the face of the shank 2 or jaw 3. At its other end the stem is provided with a head 21 by means of which it may be turned and ad justed.

Having -thus"described the invention, What is claimed as new is:

1. In a Wrench, a shank, a fixed jaw carried thereby, the shankbeing provided with a series of seats, a support slidably adjust able upon the shank and including cheek plates, pins connecting the said plates and arranged to rest in the said seats interchangeably, means for yieldablyholding the support in position with its pins so seated, and a movable jaw mounted upon the support and movable toward and away from the fixed jaw.

2. In a wrench, a shank, a fixed .jaw carried by the shank, a support including cheek plates connected in spaced relation and slidably mounted upon the shank, the-shank being provided with a series of seats, a pin extending between the cheek plates and ar ranged to restinterchangeably in the seats,

whereby to hold the support at adjustment upon the shank, a spring upon the-support bearing against that side of the shank opposite the side in which the said seats are provided, and a movable aw "carried by the support and movable toward and away from the fixed jaw.

3. In a wrench, a shank, a fixed jaw carried by the shank, a supportincludingcheek plates connected in spaced relation and slidably mounted uponthe shank, the shank being provided upon one side with a series of seats, pins extending transversely between andconnecting the cheek plates and engaging interchangeably in the seats, links pivoted to the said pins and projecting be yond that side of the shank opposite the side inwhich the seats are formed, and a jaw supported by the said links.

4:. In a wrench, a shank, a fixed ja'iv-carried by the shank, a support including cheek plates connected in spaced relation and slid ably mounted upon the shank, the shank being provided upon one side with a series of seats, nins extending transversely between and connecting the cheek plates and engagling interchangeably in the seats, links pivoted t0 the said pinsand projecting beyond that side of the shank opposite'the side in which the seats are formed, a jaw supported by the said links, the fixed jaw beingprovided with a series of teeth, and a spring upon the said support having an "end cooperating with said teeththe sprmg acting to hold the support with the said pins in engagement in the seats.

In testimony whereof I aiiix my signature in presence of two witnesses.

MAX E'CRANDALL. lVitnesses W. A. MITCHELL, B. M. HIPPART.

(Jopies of this patent may be obtained for five cents each, by "addressing the Commissioner 'ofPatents.

Washington, 11.0. Y 

